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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f732fe53e4303c9a50db2d9944482f0b0849ee375432285eedc5f4b4c39831d' 
  AND token = 'peIfcL9tS5m+0wCAYfjxUBEuslFdq3zLu7UUkvsRENQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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