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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf03c352e4f06bfc59a1c6ed669259c5163571351075675c3d3bd39c3b46560c' 
  AND token = 'JXdZXJFrJkjPEYeOO612gK+UxFRcIQFp9PpFHRLHwyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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