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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c7cf834950abd24d376a1c466565cd0ef51d34626e1bf1a65bc59658a8c230c7' 
  AND token = 'WSJ3a0WgBFQLtxVKZUYaoD/oJbsAFR2ubb292PW/AfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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