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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c9dc8ed7c88d5e17b0a09cb1778dc9d48c0671dc258b7f039f1e07a46863c66' 
  AND token = 'CJeuIeZ6yrz5kjykRfSLkPwFv/1N6JTWQZeS1aRj+KI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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