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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3ea326991e4f2a610cf3582ee62765fa06162997c5b5f23f41d05e76126e468a' 
  AND token = 'xcNQj5Erx3ygvPqSa4Epf3yD0gUQDore/+DFHiLho1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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