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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '45a06245a0793d0772695cb09ec4e3a60f47c1ab75b282d7dac4590990d1158f' 
  AND token = 'zjqMFnVKvxkktxLQc9iRTSPKsqY8grSeaIn2YyEmHMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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