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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ecdc9c866f3da4ad85b4a1babeae087773499f08cc7cae5b6122c0920b794ff1' 
  AND token = 'NeXpn6bCGO26igpC0x5j7JOfPLw8i5Sfco4i4F2O6U4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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