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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9aad642deb74c8b684f2ce35816e5aa49f35ad4701d3fe6215c83f0797c1bff6' 
  AND token = 'VwwfebZxp0zIt2n7eZXsSWLBcXr9i1OA6xDz557IhJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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