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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6b6bf0739d2a9c88da501cf0b2e72c53f4c63355c9fcb8aea5596d534647f795' 
  AND token = 'KeGpC4rJCcf73sxV47+FX2pBNYYN7D8WUw5eQiJkwrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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