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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11d33220cb8a265f8bac9476548e0e07b89a9bd7d3aeee0cce72e676ec2d2722' 
  AND token = 'qmFHpCvlwcdvaBV0yj4LoXqVagAWlzaoytNpAzofTuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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