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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd27f85a8fc3c18b0a285e7e44ce369f4aa089f84b2b8b60fb7a155d79c801223' 
  AND token = '5FkD+Hmbrv6H3e8SElZclwvFjR+jX8J1s7ln/4ZEkro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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