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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0de5a0ac8551119d238a1d6218aaaffc93f79b418aba37ea95d7bb05eaecf13e' 
  AND token = '9jilJZXmu4L7jOcvPpM2YKwfujKoBxu4uKJU0lTxdB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}