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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07be2d03dabe99a28bc0afd9239d4bc22810af403f0d4ae62a00b228bcf3b053' 
  AND token = 'pVps4fFpb2MOW/0p92UNPb+u8Umv61SW+KTO7TIs7Tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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