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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22af545b181e358ed55a577b189e4250bbaa0f32fdacee1837cb095216fd41d9' 
  AND token = 'oqepG8EL7L1f6N9LK3n8TcwF8Vhon+Xbycx6X506bBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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