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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25e7f352892d02eb60521fe37e9666a7baa61bf25bb1f403c2ec068a4535eb4d' 
  AND token = 'hL/+D94CC2KE06e/m7+sZ1GM/y3EY/ChB+A8u5DuFO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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