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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d29acc93e9895e523d5d6871aa0aeb1e3960a15fcd447ce6132748115483b6d' 
  AND token = 'iTsgiBT8+4JPGhW6gmhajyGk+ruFojXt29RXGqgNccI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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