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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04bf09a09bb4469fb6ec1d7151d27b36adc8d9171838b753d515e058ff98bd59' 
  AND token = 'FPM/+eFfc4+9scY+XhIhOePX4pQVpVavW/I8t8916cE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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