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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b32d5d5776da8d57f3883f0da441c8b4e642be19fc05b585fcd85d20d88ba91d' 
  AND token = 'x9HtfoAU0noF3iD/AGxYLVJlxUrRXAxNPAbQMSjLzJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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