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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2fa51cf10c7046730ff3d026567ee27cb3083a5313dd95f9163c4c33d983ff2' 
  AND token = '+iWrQSygtHHgt71yVWVHPKKtpVIfrdA8vYvOXE4HQjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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