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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02df8bd613f198763f4f0c311209dd782b7d9e57d53f83fdb45ec2f2bf9d831e' 
  AND token = '0RYkPAAneY8xyaam37U8BwCGacKouBosx3ip8ovWEsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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