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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8211967f166e75a1be6c82eae583f3f925fca7392df99fa60f3532c971d9c46a' 
  AND token = 'j9E7NE+lZv71q06Z6ScgmRhfF3wOsMHgUoZy4ggin8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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