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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e7cfc3b7e64f511c3b7ac7d9e58e1cfdd7d166936bbc5dc785916a0464dafef4' 
  AND token = '7QnFwM0R17g0fOpZIY3gx2ADuUnTbVld/uC/6aiujjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}