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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22cbcfa87bd1f3445ed52d95274c8fbfa9130ede9eea351b7ce7d2c511978b49' 
  AND token = 'bvvEorK1tFI1Lo7xgB8ras5AvqWmohyrkTZrR+Ez5eE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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