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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32a63d8ac014d9c5c18b27ed247cd2218ef8d9c7bce90f5b07470fd126fc3b98' 
  AND token = 'z6jdAQwXgLHw78vNk/I8mJeBX4f4XbxDSr0NwBpesgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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