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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '158e3a7700c0d18d835d4ae62e820623363a83ae14df9f4124af42d624828cee' 
  AND token = 'Umq4DWg7OSNs86yMPuqe73piknLVRRGb1autBHB4QNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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