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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2829f8f96d6144089f0a914a656fa30c3cf3ff1e16cfb06c91b10ed1f146cde9' 
  AND token = 'Wwxi5bq3HnD9sSQriyBpurlvNt2u2yV2YAHYrHeYP6M=' 
  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"
    }
  }
}