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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46fe85509d33a53825f88ec8f2e188b58b0faf44cb9d80b578286bac4fa72032' 
  AND token = 'puF5/33W6CPTN8/kbdp6p13Clvk+ftk2EQOgywHeATo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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