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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c095de10ae7fee289c6e19f6ad10e2c431e9eb7f1337badaa4ee62e505595a22' 
  AND token = 'U4egxXq/qbPP/BEj/r+KRBHU06peaoPNNqkf7F7dUzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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