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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95b75a2dc0a170988f027fab65e790d2e82e0e88d9b5b05185aded397280482e' 
  AND token = 'UCDv3kTmYV2Dd0+1E650pkWuWjW/2vz46aONvwgrewk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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