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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9aa2a9ec6093f9b78faf397df22a3e54ed54b2cf900deb3732045d12758f96b' 
  AND token = 'uu3Rso0mmIX8DcTf3tEUhdz7Dddaxl9fR3/VKgoAdZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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