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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bacbb3b88dc81a19fd09232dc42b1a7181b948348df6c66cae17c515c26448c' 
  AND token = 'rw8jnMI1h2/T6bAqRH1O8Qsfly3wy8c3L31z2hG3gmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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