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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cf92dcd1b1f1fdd79e2e9f4a134104b08bc28327f14f5b4bdf1c6f8e2f10c1aa' 
  AND token = '00xxUpADYXf/EPIQfaYvX2/w5Wis92sXY1oNm37l6EQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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