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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e86549cac14085a2446260d3425c5e3ceaf541cf6596d25baf927d3033379030' 
  AND token = 'gy34vv1ACb0ZXdy+JHp++KGcrZ9Dm4GbK92T6HFmTts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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