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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f335a9e29970ade93b2cc733337113e3ad779f01d790650e0097902477de75fb' 
  AND token = 'K5M42O4o5pN9r+4egfOO1+o55GfJRva5uL18oaiuaYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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