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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '964e0f0c2afaebe2dcfedffae146b2933983cca60a8d06dbd070eb5c809302dc' 
  AND token = 'bvXWePMd4kSukPf8nBKDnQTi0Z0R83F91yIsCbMchEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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