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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58977fadd8f4e4f9a85b6426f290f9a1bac6a5c472289d668efce5a2a8fcca16' 
  AND token = 'GWtF17brLUCTZSnsakZ3ZtH5tYMjedEBvK2rHIs3PjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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